What is the only part of an atom that cannot change (either protons, neutrons, or electrons)?

Answer:

0.2923 molar

Explanation:

M = given mass /(molar mass× volume)

150/342(1.5)

150/513

0.2923M

The oxidation number of vanadium in different molecule

VO2 + (light yellow) = V -2 x 2 = +1  so, V= +5

V2+ (violet) = +2  so, V= +2

VO2+ (blue) = V-2 = 2+ so, V= +4

V3+ (green) = 3+ so, V= 3+

The total number of electrons that an atom acquires or loses to establish a chemical bond with another atom is known as the oxidation number, also known as the oxidation state. Among them is vanadium. It can be in the +2, +3, +4, and +5 oxidation states. These states are purple (II), green (III), blue (IV), and yellow (IV), each of which has a different colour (V).

Hence, vanadium has different oxidation state.

To know more about Valency.

https://brainly.com/question/22637914

#SPJ4

Osmosis is the movement of water through a semipermeable membrane.

From the given choices none of them is completely true.

Osmosis not always causes crenation.

In osmosis, solute particles do not travel through the membrane.

And water flows from a low solute concentration to a high solute concentration.

It means that the correct answer is E. none are correct.

Two properties of water that make it more suitable than ammonia or hydrogen sulfide to support life on Earth are: High heat capacity and Universal solvent.

What is heat capacity?

Water has a high specific heat capacity, which means it can absorb and release large amounts of heat energy without significant changes in temperature. This helps to stabilize the temperature of the environment and prevent drastic fluctuations that could be harmful to life.

What is an Universal solvent?

Water is a universal solvent, which means it can dissolve many different substances. This property is important for the transport of nutrients and waste products in living organisms, as well as the chemical reactions that occur within cells. Ammonia and hydrogen sulfide, on the other hand, have limited solubility and would not be as effective in supporting the necessary chemical reactions for life.

To know more about Universal solvent, visit:

https://brainly.com/question/1834245

#SPJ1

The balanced chemical equation for the standard formation reaction of solid water is: H₂ (g) + 1/2O(g) → H₂O(s)

The standard formation reaction of solid water is: H₂ (g) + 1/2O₂(g) --> H₂O(s)

The balanced chemical equation for the standard formation reaction of solid water is: H₂ (g) + 1/2O(g) → H₂O(s)

The standard enthalpy change of the above reaction can be determined from the enthalpies of formation of the products and reactants using Hess's Law.

Standard enthalpy of formation (∆Hfo) is defined as the amount of heat absorbed or released when one mole of a substance is formed from its constituent elements in their standard states under standard conditions (∆Hfo=0 at 298 K and 1 atm).

Since H₂O(s) is the standard state of water, its standard enthalpy of formation (∆Hfo) is -285.8 kJ/mol. This means that the formation of one mole of solid water releases 285.8 kJ of heat energy.

Learn more about the Hess's Law  from the given link-

https://brainly.com/question/16795968

#SPJ11

A highly conserved protein called actin is essential for many biological functions include cell movement, cell division, and intracellular transport.

Monomeric actin molecules assemble into filamentous actin (F-actin) structures through an essential process known as actin polymerization. Nucleators, elongators, and capping proteins are just a few of the proteins that control the dynamic actin polymerization process.

The barbed end of the F-actin filament is the edge connected to actin polymerization. The plus end, also known as the barbed end, is the developing end of the actin filament.

The pointed end, also known as the non-growing or minus end, is distinguishable from the barbed end by its barbs. Most actin polymerization takes place at the F-actin filament's barb-like end.

Learn more about Actin

https://brainly.com/question/15088653

#SPJ4

Hello! :)

Noble gases are located in group 8A in the periodic table.

Elements in this group contain 8 valence electrons, making them very stable elements. Some examples of elements in this group include Neon, Argon, and Krypton.

Extrusion is the feature form at Earth's surface from the cooling of lava.

They are the ones that originate from a sudden cooling of the incandescent magma when it comes to the surface, which means that there is no time for crystals to form, either partially or totally.

Therefore, we can conclude that typical volcanic rocks are formed by the rapid cooling of lava and pyroclastic fragments.

Learn more about extrusive igneous rocks here: https://brainly.com/question/1340933

Answer:

A.

Explanation:

143 grams of C4H8O is equivalent to approximately 1.98 moles.

What is Moles?

The number of particles in one mole of a substance is known as Avogadro's number and is approximately equal to 6.02 x 10^23. This means that one mole of any substance contains 6.02 x 10^23 particles of that substance.

The use of moles as a unit of measurement is important in chemistry because it allows scientists to easily convert between the mass of a substance and the number of particles it contains. For example, if the mass of a sample of a substance is known, its number of moles can be calculated using the substance's molar mass, which is the mass of one mole of the substance. Similarly, if the number of moles of a substance is known, its mass can be calculated using its molar mass.

To calculate the number of moles of a substance, you need to divide the given mass of the substance by its molar mass.

The molar mass of C4H8O can be calculated by adding the atomic masses of its constituent atoms:

4 x (12.01 g/mol) + 8 x (1.01 g/mol) + 1 x (16.00 g/mol) = 72.11 g/mol

Now, we can use the given mass of C4H8O and its molar mass to calculate the number of moles:

Number of moles = Mass / Molar mass

Number of moles = 143 g / 72.11 g/mol

Number of moles ≈ 1.98 mol

Therefore, 143 grams of C4H8O is equivalent to approximately 1.98 moles.

Learn more about  Moles of Light from given link

https://brainly.com/question/15356425

#SPJ1

The volume of 0.500-M KOH(aq) should be added to 100 ml of a buffer solution initially containing 0.13 mol HF and 0.16 mol of NaF is 100 mL of 0.500 M KOH. ka = 6.8 × 10⁴ and pH is 3.59

given that :

ka = 6.8 × 10⁴

and pH is 3.59

moles of HF = 0.13 mol

moles of NaF = 0.16 mol

the pH formula is given as :

pH = pka + log [base]/[acid]

pH = -log(6.8 × 10⁻⁴) + log (0.16 ) / 0.13

pH =  3.33  + 0.0899

pH = 3.5

Thus, the volume of 0.500 M KOH should be added to a buffer solution 0.500 M.

To learn more about buffer solution here

https://brainly.com/question/24262133

#SPJ4

A sample of a gas has a volume of 20.  when the pressure is 2.0 atm: The volume of the gas will be 5 L, an increase in volume.

Extent is a measure of occupied three-dimensional space. it is regularly quantified numerically by the usage of SI-derived gadgets or by using diverse imperial or US commonplace devices. The definition of length is interrelated with quantity.

Volume is defined as the distance occupied within the boundaries of an item in a 3-dimensional area. it's also referred to as the capacity of the object. volume is the degree of the 3-dimensional space occupied with the aid of a count number or enclosed by means of a surface, measured in cubic units. The SI unit of quantity is the cubic meter (m3), which is a derived unit.

Learn more about Volume here:

https://brainly.com/question/959531

#SPJ4

We can calculate the molarity by dividing the quantity of barium hydroxide in moles by the volume of the initial solution.

To learn more about hydroxide concentration refer

https://brainly.com/question/28464162

#SPJ1

The volume of 1.11 m calcium chloride that must be diluted with water to prepare 748 ml of an 8.25 × 10−2 m chloride ion solution is 5.56 x 10^3 ml or 5.56 liters.

To calculate the volume of 1.11 M calcium chloride that must be diluted with water to prepare 748 mL of an 8.25 x 10^-2 M chloride ion solution, we first need to use the formula:

M1V1 = M2V2

Where:

M1 = initial molarity of the calcium chloride solution

V1 = initial volume of the calcium chloride solution

M2 = final molarity of the chloride ion solution (which is 8.25 x 10^-2 M)

V2 = final volume of the chloride ion solution (which is 748 mL)

We can rearrange the formula to solve for V1:

V1 = (M2V2) / M1

Substituting the values we know:

V1 = (8.25 x 10^-2 M x 748 mL) / 1.11 M

V1 = 5.56 x 10^3 mL

Calcium chloride is a chemical compound with the chemical formula CaCl2. It is a salt that is highly soluble in water and is commonly used as a desiccant to absorb moisture and prevent the formation of ice on roads and sidewalks. It is also used in a variety of industrial applications, such as for the production of cement, as a drying agent in gas and oil industries, and as a food preservative.

To know more about calcium chloride:

https://brainly.com/question/15296925

#SPJ11

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question we have

\(volume = \frac{50.75}{11.3} \\ = 4.491150...\)

We have the final answer as

Hope this helps you

Silicon oxide is a covalent-network solid.

Silicon is a chemical element having symbol Si and its atomic number will be 14. It is a hard, brittle crystalline solid having a blue-grey metallic luster, and it is a tetravalent metalloid as well as semiconductor. It is a member of group 14 in the periodic table. Silicon is the eighth most common element in the universe by ma very rarely occurs as the pure element in the Earth's crust.

A covalent-network solid is a chemical compound (or the element) in which the atoms are bonded by the covalent bonds in a continuous network extending throughout the material. Silicon(IV) oxide has a continuous three-dimensional network of SiO₂ units.

To know more about silicon here

https://brainly.com/question/28213172

#SPJ4

The average atomic mass of this element is 12.0107 amu.Therefore, the average atomic mass of this element is 12.0107 amu.

To find the average atomic mass, we need to take into account the abundance and mass of each isotope. We can use the following formula:

Average atomic mass = (abundance of isotope 1 x mass of isotope 1) + (abundance of isotope 2 x mass of isotope 2)

Plugging in the values given in the question, we get:

Average atomic mass = (0.0107 x 13) + (0.9893 x 12)
Average atomic mass = 0.1391 + 11.8716
Average atomic mass = 12.0107 amu

Therefore, the average atomic mass of this element is 12.0107 amu.

To calculate the average atomic mass of an element with two stable isotopes, you need to multiply the mass of each isotope by its abundance (in decimal form) and then add the results together. Here's the calculation:

Isotope 1: 13 amu * 0.0107 = 0.1391
Isotope 2: 12 amu * 0.9893 = 11.8716

Average atomic mass = 0.1391 + 11.8716 = 12.0107 amu

So, the average atomic mass of this element is 12.0107 amu.

Visit here to learn more about  atomic mass :  https://brainly.com/question/29117302
#SPJ11

When the number of atoms that come together increases, the number of molecular orbitals (MOs) also increases. When two atomic orbitals overlap and create a bond, two MOs are formed. Similarly, when three atomic orbitals overlap and create a bond, three MOs are formed, and so on.

Therefore, as the number of atoms that come together increases, the number of MOs also increases.Explanation:A molecular orbital (MO) is formed by the overlap of atomic orbitals on adjacent atoms. The number of MOs that are formed depends on the number of atomic orbitals that overlap. When two atomic orbitals overlap, two MOs are formed. One is called the bonding MO, and the other is called the antibonding MO.

When three atomic orbitals overlap, three MOs are formed. One is the bonding MO, one is the nonbonding MO, and one is the antibonding MO. Similarly, when four atomic orbitals overlap, four MOs are formed: two bonding MOs, one nonbonding MO, and one antibonding MO. And so on.

To know more about orbitals, visit:

https://brainly.com/question/32355752

#SPJ11

Similar to Cohesion, adhesion is the attraction between molecules of different substances . Water uses adhesion when it's attraction to another substance is greater than the water's attraction to itself. if you have ever dropped a cup of water on a hardwood floor,you know that it spreads out instead of foaming beads.

The element with 38 protons, 36 electrons, and 40 neutrons is Strontium (Sr).

Strontium (Sr) is the element with 38 protons, 36 electrons, and 40 neutrons. It belongs to the alkaline earth metal group on the periodic table. The atomic number of an element corresponds to the number of protons in its nucleus, so in this case, the atomic number is 38. Since atoms are electrically neutral, the number of electrons in an atom is also equal to the number of protons. Therefore, there are 36 electrons surrounding the nucleus of the strontium atom.

The total number of protons and neutrons in an atom is known as the mass number. In this case, the mass number is 38 (protons) + 40 (neutrons) = 78. Strontium has various isotopes, which are atoms with the same number of protons but different numbers of neutrons. The most common isotope of strontium, with a mass number of 88, has 50 neutrons. However, the specific isotope mentioned in the question has a mass number of 78 and 40 neutrons.

Strontium is a soft, silvery-white metallic element that is highly reactive with water and air. It is commonly used in pyrotechnics to produce red-colored flames. Strontium compounds are also utilized in the manufacturing of ceramics, glass, and fireworks. Its radioactive isotope, strontium-90, has been used in medical imaging and cancer treatments.

Learn more about Strontium

brainly.com/question/27791646

#SPJ11

Sun is the centre of the solar system containing 8 planets. Some planets have moons revolving around them. The planet from the sun which a moon is Earth.

Planets are spatial objects formed by gases, soil, and dust and are having a gravitational force. The only living planet is earth. The moon of earth is itself called moon which is revolving around the earth.

In solar system the nearest planet to sun is mercury which have no moons. Next is venus also having no moons. The next planet in the series is earth having one moon.

After earth, mars is closest to sun which have two moons namely Deimos and Phobos. After mars,Jupiter having the highest number of moons and then saturn.

Therefore, the first planet from sun having at least one moon is earth.

To find more about solar system, refer the link below:

https://brainly.com/question/18365761

#SPJ1

Answer:

Explanation:

Answer:,,,,,

The extra step taken when cleaning up an acid or base spill is :

Acid and Base spills are treated with an extra caution during cleanup to prevent injury to skin and this is because strong acids are;

After neutralization, clean up the spill with a towel ( usually paper towel ) and avoid using a strong base to neutralize a strong acid as well.

Hence we can conclude that Neutralizing the Acid/base spill with with a weaker base such as sodium Bicarbonate or weak acid respectively  is the extra step.

Learn more about chemical spills : https://brainly.com/question/609930

When solid converts to gas then heat is required to break the intermolecular forces of attraction between the particles. In this process heat increase but temperature remains the same. Therefore, the correct option is option B.

Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure. Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.

During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing.

Therefore, the correct option is option B that is energy is absorbed by the substance to cause a phase change.

To learn more about phase transition, here:

https://brainly.com/question/3255181

#SPJ1

To determine the number of moles of hydrogen needed to crack one mole of the long saturated hydrocarbon chain (C40H82), we can analyze the reactants and products involved in the cracking reaction.

The cracking reaction is given as: C40H82 -> 3 C8H18 + n C2H6. From the equation, we can see that one mole of the long hydrocarbon chain (C40H82) produces three moles of octane (C8H18) and n moles of ethane (C2H6). Since the cracking process involves breaking the carbon-carbon bonds and forming new carbon-hydrogen bonds, the number of hydrogen atoms in the products should remain the same as in the reactant.

The long hydrocarbon chain (C40H82) contains 82 hydrogen atoms, and the products, 3 moles of octane (C8H18), contain (3 moles) * (18 hydrogen atoms/mole) = 54 hydrogen atoms. Therefore, the number of moles of hydrogen needed for cracking one mole of the long hydrocarbon chain can be calculated as: Number of moles of hydrogen = 82 - 54 = 28 moles. Hence, 28 moles of hydrogen are required to crack one mole of the long saturated hydrocarbon chain (C40H82).

To learn more about number of moles click here: brainly.com/question/20370047

#SPJ11

At T 25 ° C (298 K) and P 1 atm are stated by RTP ⇒ Vm = 24.4 liters / mol

86.4 dm³ = 86.4 L = 86.4/24.4 = 3.54 mol

1 mole = 6.02.10²³ molecules

3.54 x 6.02.10²³ = 21.31 x 10²³ molecules

N = 21.31

The attractive forces between pentane molecules are weaker than those between water molecules.

The boiling point of a substance is determined by the strength of the intermolecular forces between its molecules. In the case of pentane and water, both substances have different types of intermolecular forces.

Pentane is a hydrocarbon and consists of nonpolar molecules. The primary intermolecular force present in pentane is London dispersion forces (also known as van der Waals forces). London dispersion forces occur due to temporary fluctuations in electron distribution, which induce a temporary dipole in a molecule.

These temporary dipoles then induce similar dipoles in neighboring molecules, resulting in weak attractions between the molecules. Since pentane molecules are nonpolar and have relatively low molecular masses, the London dispersion forces between pentane molecules are relatively weak.

On the other hand, water is a polar molecule. It has strong hydrogen bonding between its molecules. Hydrogen bonding occurs when a hydrogen atom, bonded to an electronegative atom such as oxygen, nitrogen, or fluorine, interacts with a lone pair of electrons on another electronegative atom.

The hydrogen bonds between water molecules are relatively strong compared to the London dispersion forces in pentane.

As a result, pentane has weaker intermolecular forces compared to water. The weaker intermolecular forces in pentane require less energy to break, resulting in a lower boiling point compared to water. Therefore, pentane boils at a lower temperature than water.

To know more about attractive forces refer here:

https://brainly.com/question/31081323#

#SPJ11

the empirical composition of this substance Its molecular weight has also been calculated to be around 156.

the molecular equation Response: CGHG.

Calculate the grams of carbon and hydrogen in 4.40 g of CO2 and 2.70 g of H2O, respectively.

4.40 g x (12.011 g/44.0098 g) = 1.20083 g of carbon

2.70 g times (2.0158 g / 18.0152 g) Equals 0.3021482 g of hydrogen

2) Calculate the corresponding number of moles from the grams of C and H molecular weight..

20083 g / 12.011 g/mol = 0.09998 mol of carbon

In terms of hydrogen, 0.3021482 g / 1.0079 g/mol equals 0.2998 mol

3) To break up the molar amounts listed above into smaller, more manageable amounts, divide each one by its lowest value.

numbers.

0.09998 mol/0.09998 mol = 1 for carbon.

hydrogen: 0.298 mol/0.0998 mol = 2.9986 mol = 3

We have now discovered the solution: the substance's empirical formula is CGHG

Learn more about molecular weight here:

https://brainly.com/question/27988184

#SPJ4

Answer:

The word gentle traces back to the Latin word gentlis, meaning “of the same clan,” and at first the world was used to describe people belonging to distinguished families, who were seen as courteous and noble. Nowadays you’re more likely to hear the word used to refer to things that are calm, moderate, and without harshness. The word is often applied to people, but it can be used more broadly to describe anything that is mild, such as "a gentle detergent" or "a gentle reminder."